over time, a lot of coins will disappear
That's what happened in 2017 bull run also. There were many coins which were in top 10 in 2017 but those are not avaible in 2021.
Only the good projects coins will survive long term while rest of the coins will just disappear as no one will buy the shitcoins and there will no demand for them.
only good projects have a permission to climb the top 10 ranking . a shitcoins obviously dont belong on that level so why say that the top coins from 2017 are now gone today ?
but you can try again and clarify if what you mean is that the ranking of top 10 coins from 2017 have changed because that is more valid because i think few coins are now kicked out in top 10 and replaced by new coins like bnb , dot and etc ..
The other top coin replaced due to some technical difficulties and we can still see them down the list although they are replaced but still they are at good standings with billions of volume.
Compare to the new project where the investors always fo the hit and run process so if other investor don't want to bag hold they should sell if they are in profit so that they will not hold those new shitcoins.